Gates CO34919 Engine Coolant Filler Neck

Engine Coolant Filler Neck for Toyota and Scion

The Gates Coolant Outlet CO34919 is an OE-style engine coolant filler neck built for direct replacement on select Toyota and Scion applications. It is designed to match original fit and function while addressing common aftermarket issues with material and design consistency.

Key Features

• Plastic coolant filler neck construction
• OE Exact fitment for original-style replacement
• Two bolt holes for secure mounting
• Outlet dimensions: 1.22 in. outside diameter and 1.01 in. inside diameter
• Secondary outlet dimensions: .325 in. outside diameter and .224 in. inside diameter
• Coolant outlet / coolant fill flange design
• Gates Coolant Outlet line coverage for water outlets and thermostat housing assemblies

Product Details

Gates CO34919 is part of the Coolant Outlet product line, which focuses on replacement coolant outlets and related housing components for vehicles that need a direct-fit cooling system repair. This coolant filler neck is engineered to perform like the original part and provide long service life in the cooling system.

Compatible With 2000-2005 Toyota Echo, 2004-2006 Scion xA, and 2004-2006 Scion xB. This part cross-references Dorman - OE Solutions 902-679 for the same application.

Common Repair Uses

• Cracked or leaking coolant filler neck
• Damaged coolant outlet sealing surface
• Cooling system leak at the fill flange
• Broken or warped plastic outlet housing
• OE-style replacement during thermostat housing service

Installation Notes and Tips

Verify outlet diameter, bolt-hole spacing, and hose connection points against the original part before installation. Inspect the mating surfaces and surrounding cooling system components for wear, corrosion, or residue that could affect sealing. Because this part uses a plastic housing design, handle it carefully during removal and tightening to avoid cracking.

Quality Assurance

Gates designs this coolant outlet to address common aftermarket material and manufacturing concerns while maintaining OE-style fit and function. The CO34919 is built as an exact-fit replacement for the listed Toyota Echo, Scion xA, and Scion xB applications.